Airlines are perhaps the companies most directly affected by the order to ban citizens of seven countries from entry into the United States, even those with previously valid visas or US green cards.

The airlines have no choice but to cooperate with US Customs and Border Patrol instructions, even as they deal with passengers and, surely, employees who can no longer enter the United States.

The Verge has reached out to a number of airlines to get comment and we will be updating this post as we hear back.

Delta Air Lines

An Executive Order issued on Jan. 27 has suspended for 90 days the entry into the United States of most immigrant and non-immigrant “aliens [8 USC 11101(a)(3)]” from the nations of Libya, Iran, Iraq, Somalia, Sudan, Syria and Yemen. Entry of nationals from Syria as refugees is suspended indefinitely.

Delta will make every effort to contact impacted customers with flexible rebooking options, including refunds. Worldwide customer contact information can be found here.

United Airlines

We are aware of the directive and are working with the federal government to comply.

Effective immediately and until further notice, due to an executive order, the U.S. Department of State has revoked immigrant and non-immigrant visas for travelers to the United States from Iran, Iraq, Libya, Somalia, Sudan, Syria and Yemen. Please note that this does not affect U.S. resident card holders. Customers who meet these qualifications will not be able to board a United- or United Express-operated flight to the U.S. If you have travel plans that are affected by this new regulation, please contact the United Customer Contact Center. Additional information is available through the Department of State.